[geeks] Re: geeks digest, Vol 1 #64 - 14 msgs

[Ken Hansen]

There are OEM vendors that take Sun boxes and make them 48v rack systems for telco/colo installations. I recall that Sun even had a line of 48v machines aimed at the telco market (re-worked case/PS for a midrange Ultra server, IIRC), but that was about 4 years ago, I think.

I don't know how popular they were, as everyone had gotten used to working around the 48v issue a long time ago - I think it was mainly for deploying servers/routers/whatever in COs that have no provision for 110v UPS...

Ken

-----Original Message-----
From: James Fogg [mailto:jfogg at vicinity.com]
Sent: Friday, April 20, 2001 8:10 AM
To: geeks at sunhelp.org
Subject: Re: [geeks] Re: geeks digest, Vol 1 #64 - 14 msgs


Umm, -48v. "reverse" current is used to provide sealing current that prevents
corrosion on lines.

On Thu, 19 Apr 2001, THOU SPAKE:
> On Thu, Apr 19, 2001 at 08:20:19PM -0400, Kevin P. Inscoe wrote:
> > Yes many are. In fact we use them at the CLEC (well I used to work for).
> > Mainly the UE420/220 and Netra lines are NEBS compliant which for those
> > that do not know means 48VDC power. I know the 4500 are not but maybe
> > the new 4800's are not sure.
> 
> NEBS also means front-to-back cooling, etc, so you can stack them flush in
> a rack.  Its not just 48VDC.
> 
> Bill
> 
> -- 
> Bill Bradford
> mrbill at mrbill.net
> Austin, TX
> _______________________________________________
> GEEKS:  http://www.sunhelp.org/mailman/listinfo/geeks
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